How Things Work
CBSE · Class 4 · EVS
Summary of How Things Work for CBSE Class 4 EVS. Key concepts, important points, and chapter overview.
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Overview
This chapter explores the fascinating world around us by helping students understand how different objects and materials behave in various situations. Through hands-on activities with spinning objects, floating and sinking experiments, and boat-making projects, students discover the basic principles
Key Concepts
Not all objects can spin effectively
Not all objects can spin effectively. Objects that are balanced and have their center point in the middle spin better. Coins, bangles, and wooden tops
Whether an object floats or sinks
Whether an object floats or sinks in water depends on multiple factors, not just its weight. Light objects like leaves usually float, while heavy obje
The same material can float
The same material can float or sink depending on its shape. Aluminium foil spread out or shaped like a cup will float, but when pressed into a tight b
Different materials behave differently in water
Different materials behave differently in water and when spinning. Some materials are better for making boats, while others work well for spinners. St
Learning Objectives
- To develop curiosity about how everyday objects work and behave
- To understand which objects can spin and what makes them spin effectively
- To explore the concepts of floating and sinking through practical experiments
- To learn that floating and sinking depend on multiple factors, not just weight
- To understand how shape affects the behavior of objects in water
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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